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How Mazda got Skyactiv-X to work is incredible

"Take everything you know about engines and turn it around," Mazda North America Vehicle Development Engineer Dave Coleman says, patiently and with a look of benevolent pity, as he's quizzed about the particulars of the company's new engine. The Skyactiv-X engine is enigmatic — and deceptively simple in operation. And the bottom line for American consumers is that they'll be able to buy a car (or crossover; we don't know yet what vehicle will first get it) by late 2019 that provides diesel-like fuel economy but runs on regular old gasoline. In between diesel and spark ignition, but it's neither To truly understand it, you have to dive into the contradictions. Take that regular old gasoline: Contrary to common sense, the lower the octane, the better it works. In the lab, the Skyactiv-X engine loves 80 octane. The lowest Americans get is 87, so the engine is tuned for that octane. Go higher and you lose some low-end torque. Coleman was right. It's hard to wrap your head around an engine that thrives just at the point when most gas engines would aggressively self-destruct. It uses a supercharger to pump additional air — but not additional fuel. It uses spark plugs to start a combustion cycle that normally doesn't need a spark. And, quixotically, it's not displacing Mazda's own American-market diesel engine, currently languishing in a seemingly endless hell of regulatory approval. More bizarre: Mazda is a tiny automaker facing real existential headwinds, and gasoline compression ignition is a massive challenge. GM and Hyundai announced compression ignition, or HCCI, projects (full name, homogeneous charge compression ignition) to great fanfare, but they never amounted to a production hill of beans, crippled by reliability issues or horrible vibrations. Worse, they only worked at an unusably narrow range — low RPMs and low loads. HCCI research improved direct-injection gas and diesel engine technologies for these companies, but HCCI itself remains untamed. The benefits of lean combustion Why even try to tame HCCI? The answer is much better fuel economy and lower emissions. Less burned carbon-based fuel, less carbon dioxide released. That's simple. But there are some thermodynamic reasons for the lean combustion you can achieve with compression ignition that are worth explaining. The ideal amount of fuel for a conventional engine to burn is about a 14:1 air-to-fuel ratio. That lets every molecule burn nicely, in theory.

Hiss off! Venomous snake takes refuge in Australian man’s engine bay

A man who went out for a walk in suburban Sydney got quite a surprise when he returned to his red Mazda. Left on his windshield was a hand-written note warning him that a venomous red-bellied black snake had taken up residence in his car. "Hi," the note read, "this afternoon a red Belly slithered up into your front left tyre. Please be careful." The snake is a native of wet areas of eastern Australia that can grow up to 2.5 meters (about 8 feet), making it one of Australia's largest venomous snakes. They're considered dangerous, but shy, unlikely to bite unless severely agitated. When Michael Garbutt popped the hood, he found the snake coiled up inside in the corner. "To say I was shocked is an understatement," he told The Sydney Morning Herald. "On reflection I don't think I would have put my hand out to pop the bonnet if I had known it was there." So he took to Google to look for a local snake wrangler and found Andrew Melrose, of Shire Snake Catchers. By the time he arrived, the snake had moved down into the engine. Then it moved behind the wheel guard, and then under the engine to the front bumper, then back to the right front wheel. Melrose said he coaxed it out by gently touching its body. "I've done it my whole life," he said. "It looks simple but if you haven't done it before you can get killed real quick." In the end, Melrose ended up grabbing the snake from the ground outside of the car and dropping it in a bag. The whole de-snaking process took about an hour. Melrose said the snake is common on the swampy peninsula area where it was found, since it finds plenty of frogs, eels and other creatures to eat. He says it's common to find them in cars. "If they get startled they look for the first place that is safe," he said. "The place I found it was very bare. There was no place for the snake to escape. People would have startled it and the only place for it to hide was the car. The driver could have driven off unaware and parked and the snake would have left the car when it felt safe." So let this be a lesson for you, Autoblog readers: familiarize yourself with your local venomous snakes. And keep the number of your local snake wrangler handy at all times. Or just don't move to Australia.Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Image Credit: Unknown Auto News Weird Car News Mazda snake

Suzuki recalls 2 million cars globally

Suzuki is recalling two million vehicles across the globe, including a number of Chevrolet Cruze sedans that it builds for General Motors, because the ignition switches may begin to smoke. None of the Cruzes being recalled were sold in the US, though. This recall is limited to the Japanese, European and Australian markets. In Suzuki's home market, 1,873,000 vehicles are being recalled, including the Cruze and a number kei cars built for Mazda (the Carol and AZ-Wagon), as well as the automaker's own Alto, Wagon R and Swift. Affected vehicles were built between 1998 and 2009. The remaining 133,000 vehicles include Cruzes and other Suzuki products sold in Europe and Australia. There have been no reports of injuries or accidents due to the 67 reported incidents, all of which come from the Japanese market, a Suzuki spokesperson told Automotive News. Related Video: